linux-kernel - Re: [PATCH v2 2/2] regulators: max8973: initial DT support

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Message-ID: <51C88E96.2010408@cogentembedded.com>
Date:	Mon, 24 Jun 2013 22:23:18 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>
CC:	linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org
Subject: Re: [PATCH v2 2/2] regulators: max8973: initial DT support

Hello.

On 06/24/2013 02:50 PM, Guennadi Liakhovetski wrote:

> This patch adds primitive DT support to the max8973 regulator driver. None
> of the configuration parameters, supported in the platform data are yet
> available in DT, therefore no configuration is performed if booting with
> no platform data. This means, that DT instantiation can only be used on
> boards, where no run-time configuration of the chip is required. In such
> cases the driver can be used to scale its output voltage. In the future
> support for configuration parameters should be added.

> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@...il.com>
> ---

> v2: as suggested by Mark, regulator bindings are now directly under the
> main max8973 I2C device node.

>   .../bindings/regulator/max8973-regulator.txt       |   21 +++++++++++
>   drivers/regulator/max8973-regulator.c              |   37 +++++++++++++------
>   2 files changed, 46 insertions(+), 12 deletions(-)
>   create mode 100644 Documentation/devicetree/bindings/regulator/max8973-regulator.txt

> diff --git a/Documentation/devicetree/bindings/regulator/max8973-regulator.txt b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt
> new file mode 100644
> index 0000000..8d38ab2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt
> @@ -0,0 +1,21 @@
> +* Maxim MAX8973 Voltage Regulator
> +
> +Required properties:
> +
> +- compatible:	must be "maxium,max8973"

    I see only "maxim" and "dallas" for Maxim Integrated Products in 
Documentation/devicetree/bindings/vendor-prefixes.txt. Is "maxium" some 
new, unknown vendor?

> +- reg:		the i2c slave address of the regulator. It should be 0x1b.
> +
> +Any standard regulator properties can be used to configure the single max8973
> +DCDC.
> +
> +Example:
> +
> +	max8973@1b {
> +		compatible = "maxium,max8973";
> +		reg = <0x1b>;
> +
> +		regulator-min-microvolt = <935000>;
> +		regulator-max-microvolt = <1200000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c
> index b2dbdd7..0c5195a 100644
> --- a/drivers/regulator/max8973-regulator.c
> +++ b/drivers/regulator/max8973-regulator.c
[...]
> @@ -439,16 +447,21 @@ static int max8973_probe(struct i2c_client *client,
[...]
> +	if (pdata) {
> +		ret = max8973_init_dcdc(max, pdata);
> +		if (ret < 0) {
> +			dev_err(max->dev, "Max8973 Init failed, err = %d\n", ret);

    Not "MAX8973"?

WBR, Sergei

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